Index: trunk/pstamp/src/ppstampMakeStamp.c
===================================================================
--- trunk/pstamp/src/ppstampMakeStamp.c	(revision 16239)
+++ trunk/pstamp/src/ppstampMakeStamp.c	(revision 16593)
@@ -426,4 +426,11 @@
     PS_ASSERT_PTR_NON_NULL(hdu->header, 1)
 
+    // for some reason these are getting initialized to garbag
+    input->fpa->fromTPA = 0;
+    input->fpa->toTPA = 0;
+    input->fpa->toSky = 0;
+    chip->toFPA = 0;
+    chip->fromFPA = 0;
+
     if (!pmAstromReadWCS(input->fpa, chip, hdu->header, 1.0)) {
         // we can live without WCS if the ROI is specified in pixels